Dictionary![]() ![]() nu•cle•o•somePronunciation: (nOO'klē-u-sōm", nyOO'-), [key] —n. Cell Biol. any of the repeating subunits of chromatin occurring at intervals along a strand of DNA, consisting of DNA coiled around histone. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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